A long time ago on one occassion he lost his temper and was very nasty and verbally/emotionally abusive.
Since then there has been nothing like that but he is very emotionally changeable - what he wants can change in a second for apparently no reason. I think he may be a narcissist but that's by the by.
He has this way of saying things (not just to me, to counter staff, waiters etc) that to me has an undercurrent of menace in his tone. It's hard to describe but its a sort of very cold and firm way of speaking.
I am scared of him but it's all in my head. I think I'm scared that if I don't keep him happy he will lose his temper again -but i. it was a long time ago and there has been nothing like that since and ii. I should really be able to assert myself more with him as in other areas of my life I am really assertive.
I feel very anxious interracting with him when he gets the "tone of voice".
But it's all in my head isn't it. How can I manage my anxiety and start to interact with him in a more normal way?